Process of and apparatus for spinning



Jan. 8, 1935'.

P. E. HARRISON PROCESS OF AND APPARATUS FOR SPINNING Filed Jan. 19', 1933 2 Sheets-Sheet 1 IN VEN TOR. 071/ Jan. 8, 1935. P. E. HARRISON 1,986,813

PROCESS OF AND APPARATUS FOR SPINNING Filed Jan. 19, 1333 2 Sheets-Sheet 2 IN VEN TOR Patented Jan. 8, 1935 I PATENT OFFICE 'PnocEss OF AND APPARATUS Fon SPINNING Paul E. Harrison, ,Donelson, Tenn, assignor to Du Pont Rayon Company, New York, N. Y., a corporation of Delaware.

Application January 19, 1933, Serial No. 652,481 19 Claims. (Cl. 118+49) This invention relates to the spinning of thread in centrifugal buckets. The invention will be described in its application to the manufacture of rayon but it is to be understood that this par- ,ticular description is used for facility only and is not limitative of the invention.

The prior art describes methods of manufacturing rayon in which the rayon is fed through a reciprocating guide into a revolvingbucket. Attempts have been made to increase the diameter and the depth of these buckets butthe diameters of the buckets have been kept comparatively small by the necessity of spinning at high speeds and by the tendency of prior art buckets to burst at high speeds, and attempts to increase the depths of the bucket have been blocked by the increased length of time required to build a cake and by the unsatisfactory nature of the cake so built.

In my copending application Serial No. 637,604 filed October 13, 1932, is disclosed a method of introducing a thread into a bucket through the bottom of the bucket, in distinction from prior art methods which introduced the thread through the top of the bucket, producing advantages in the handling of cakes, and simplification of the reciprocating machinery.

It is an object of this invention to wind thread in centrifugal buckets with economy of time and machinery. Another object of the invention is to produce a new and more emcient spinning apparatus. Another object of the invention is to improve the process of manufacturing rayon from viscose. Other objects of the invention will be in part apparent and in part set forth elsewhere herein.

The objects of the invention are accomplished, generally speaking, by a spinning mechanism which can in equal time and at equal speed wind into cakes double the quantity of thread that could be wound by prior art machines, and which can, when applied to the manufacture ofrayon, spin in one bucket double the amount of thread that could be spun by prior art methods in equal time. The objects of the invention are attained, more specifically speaking, by spinning one cake of normal size at the bottom and another cake of normal size at the top of a bucket longer than buckets previously used in the art. I

In the accompanying drawings Figure 1 is a view, partly in section, of .a mechanism for spinning rayon embodying one form of my invention; Figure 2 is a similar to Figure 1 but embodies a modified form of bucket and of reciprocating mechanism; Figure 3 is similar to Figure 1' but embodies still another form of reciprocating mechanism.

In Figure 1, 10. indicates a bucket (see United States Patent 1,831,860,. issued November 17, 1931) having a skirt 11 to the inside of which the rotor of an electric motor is attached and within which the statpr of the motor projects. In buckets of this type embodying my present invention there is a hole through the center of the stator and the bottom of the spinning portion of the bucket. Referring again to Figure 1, 12 is a tube passing through the stator and into the spinning portion of the bucket; 13 is a reciprocable thread guide, which may be of glass, hard rubber, a resin, or the like, passing through the tube 12; 131 are portions in the thread guide reduced in diameter to reduce the contact of thread and guide to a minimum; 14 is a tube for supporting the thread guide; 15 is a screw-threaded seat mounted in the reciprocating mechanism; 16 are screw threads in the ends of support 14 which provide for an adjustment of the guide in its relation to the bucket; 17 is a bucket cover of any suitable type; 18 is a reciprocable thread guide entering the bucket from the top; 19 is a screw threaded seat in the reciprocating mechanism, not shown; 20 is a screw threaded holder for the guide 18, mounted in part 19, by means of which the guide 18 may be adjusted in its re lation'to the bucket.

In the preferred form of my invention the bucket is made deep enough to hold two cakes of ordinary size without overlapping.

' passes through the guide to the interior of the bucket. The strokes of the guides within the\ bucket are so arranged that they do not overlap,

preventinginterwinding of threads and providing for the production of two separate cakes. The thread speeds and reciprocations per minute of the two guides are preferably coordinated so that two cakes of substantially uniform size will be built up during any selected spinning time.

Figure 2 illustrates another mechanism embodying the principles of my invention; in this figure 30 is a motor; 31 is a hollow armature having an extended end which both. pierces and carries the bucket; 33 indicates generally a mechanism for reciprocating the thread in the bucket; 34 is a bucket cover of any suitable type; 35 is a reciprocating mechanism extending into the bucket through the cover.

The operation of this mechanism is' similar to that of Figure 1: A thread is brought into the I July'14, 1932.

top of the bucket by one reciprocating guide and another thread is brought into the bottom of the bucket by the other reciprocating guide, forming two cakes in the one bucket.

Figure 3 illustrates a mechanism in which the principles of this invention are combined with the principles of the invention disclosed in copending application Serial Number 622,390, filed In this figure, 40 is a traversing mechanism mounted for rotational movement in, and with respect to, the bottom of the bucket; 41 is a similar reciprocating mechanism mounted for rotary motion in, and with respect to, the cover of the bucket; 42 is a non-reciprocating thread guide which carries a thread through the bottom of the bucket; and 43 is a non-reciprocating thread guide which carries a thread throughv the top of the bucket. The bucket is detachably mounted on and is driven by a'hollow spindle not shown.

An advantage of my invention is that one bucket winds in a given time twice as much yarn as was produced by prior art machines without increasing bucket speed and with no increase or only slight increase in power consumption. This invention, consequently, makes it unnecessary to adopt the extremely high spinning speeds with which'the industry has been experimenting in an attempt to cut production costs. Another advantage of the invention is in providing new and more eflicient apparatus for the manufacture of rayon. Other advantages of the invention will be apparent to persons skilled in the art.

As many apparently widely different embodiments of this invention may be made without to be understood that I do not limit myself to the specific embodiments thereof except as defined in the appended claims.

I claim:

1. In a spinning mechanism a centrifugal bucket, means for introducing thread into the bucket from the top, and means for introducing thread into the bucket from the bottom whereby a plurality of separate bucket cakes are produced.

2. In a spinning mechanism a centrifugal bucket, means for reciprocably introducing thread into the bucket from the top, and means for introducing thread into the bucket from the bottom whereby a plurality of separate bucket cakes are produced.

3. In a a spinning mechanism a centrifugal bucket, means for introducing thread into the bucket from the top, means for introducing thread into the bucket from the bottom, and means for synchronously reciprocating the said means axially of the bucket whereby a plurality of separate bucket cakes are produced.

4. In a spinning mechanism a centrifugal bucket, a thread guide for reciprocably introducing thread into the bucket from the top, means for introducing thread into the bucket from the bottom, and means for synchronously reciprocating the thread brought into the bucket by the said guide and the said means axially of the bucket whereby a plurality of separate bucket cakes are produced. I

5. In a. spinning mechanism' a centrifugal bucket, a thread guide for reciprocably introducing thread into the bucket from the top, a thread guide for reciprocably introducing thread into the bucket from the bottom, and means for synchronously reciprocating the thread brought into the bucket by the said guides axially of the bucket whereby a plurality of separate bucket cakes are produced.

6. In a spinning mechanism a centrifugal bucket, a reciprocable thread guide for introducing thread into the bucket at the top, a reciprocable thread guide for introducing thread into the bucket from the bottom, and means for synchronously reciprocating the said guides whereby a plurality of separate bucket cakes are produced.

7. In a spinning mechanism a bucket integrating a motor rotor and enclosing a motor stator, a tube passing through the motor stator and penetrating the spinning portion of the bucket, a reciprocable thread guide passing through the said tube and into the interior of the bucket and a reciprocable thread guide entering the bucket 'from the top, whereby two bucket cakes are produced in one bucket.

8. In a spinning mechanism a centrifugal bucket, a rotor attached to said bucket, a thread guide penetrating said bucket through the rotor, a thread guide entering said bucket from the top, and means for reciprocating said guides whereby two separatecakes are produced. I

9. In a spinning mechanism a centrifugal -into the bucket from the bottom, and means for synchronously reciprocating the departing from thespirit and scope thereof, it -iS said means axially of the bucket.

11. In a spinning mechanism a centrifugal bucket, means for introducing thread into the bucket from the top, means for introducing thread into the bucket from the bottom, and means for reciprocating each said thread axially of the bucket whereby a plurality of separate bucket cakes are formed.

, 12. In a spinning mechanism a centrifugal bucket, means for introducing thread into the bucket from the top, means for introducing thread into the bucket from the bottom, and means for reciprocating the said means axially of the bucket whereby a plurality of separate bucket cakes are produced.

13. In a spinning mechanism a centrifugal bucket, a thread guide for reciprocably introducing thread into the bucket from the top, means for introducing thread into the bucket from the bottom, and means for reciprocating the thread brought into the bucket by the said guide and the said means axially of the bucket whereby a plurality of separate bucket cakes are produced.

14. In a spinning mechanism a centrifugal bucket, a thread guide for reciprocably introducing thread into the bucket from the top, a thread guide for reciprocably introducing thread into the bucket from the bottom, and means for reciprocating the thread brought into the bucket by the said guides axially of the bucket whereby a. plurality of separate bucket cakes are produced.- 15. In a spinning mechanism a centrifugal bucket, a reciprocable thread guide for introducing thread into the bucket at the top,'a reciprocable thread guide for introducing'thread into the bucket from the bottom, and means for reciprocating the said guides whereby a plurality of separate bucket cakes are produced.

16. In a spinning mechanism a centrifugal bucket, means for introducing thread into the bucket from the top, means for introducing thread into the bucket from the bottom, and means for reciprocating the said means axially of the bucket.

for introducing thread to the guide, and mounted in the bucket cover a similar thread reciprocating mechanism. Y

t 18 In a thread manufacturing machine a cenfor introducing thread through the bottom of the bucket, and reciprocable means for carrying and reciprocating said guidesr 19. The method of spinning thread in a centrifugal. bucket which comprises simultaneously introducing thread at the base of the bucket to form' one cake, and at the top ot the bucket to 10 form a separate cake.

' PAUL E.'HARR.ISON

trifugal bucket, means comprising 'a reciprocable guide for introducing thread through the top of the bucket,'means comprising a reciprocable guide 

